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UPLC-MS/MS测定小麦茎秆木质素单体交联结构的方法

Determination of Lignin Monomer Crosslinking Structures in Wheat Stems by UPLC-MS/MS
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摘要 建立一种利用UPLC-MS/MS对小麦茎秆木质素单体交联结构进行定性与定量分析的方法,为木质素的开发利用提供科学依据。采用ACQUITY UPLC®BEH C_(18)(2.1 mm×100 mm,1.7μm)色谱柱分离,以超纯水和乙腈为流动相进行梯度洗脱,选择MRM(多反应监测模式)进行检测。结果表明,9种木质素单体交联结构在相关线性范围内线性良好(R^(2)=0.9989),回收率为91.67%-100%,相对标准偏差(RSD)为0.24%-2.10%。将该方法应用于拔节后14 d小麦茎秆中9种木质素单体交联结构特性的检测,结果显示,样品中9种木质素单体交联结构的保留时间与标准品的保留时间相同,G(8-8)G是检出质量浓度最高的木质素单体交联结构,质量浓度范围为9.53-10.12 ng/g。该方法专一性强,灵敏度高,适用于对小麦茎秆9种木质素单体交联结构进行准确定性定量。 A method for the qualitative and quantitative determination of lignin monomer crosslinking structures in wheat stems by UPLC-MS/MS was established,providing a scientific basis for the development and utilization of lignin.The chromatographic separation was carried out on an ACQUITY UPLC®BEH C18(2.1 mm×100 mm,1.7μm),ultrapure water and acetonitrile were used as the mobile phase to conduct gradient elution,and MRM(multiple reaction monitoring)were employed for detection.The results showed that the crosslinking structures of 9 lignin monomers had good linearity in the linear correlation range(R^(2)=0.9989),the recovery was 91.67%-100%,and the relative standard deviations was 0.24%-2.10%.The method was applied to detect the crosslinking structure characteristics of 9 lignin monomers in wheat stems 14 d after jointing.The results revealed that the retention times of the crosslinking structures of 9 lignin monomers in the sample were the same as that of the standard one.G(8-8)G was the crosslinking structure of lignin monomers with the highest mass concentration,and the mass concentration range was 9.53-10.12 ng/g.In conclusion,the method is of strong specificity and high sensitivity.It is suitable for accurate qualitative and quantitative analysis of the crosslinking structures of nine lignin monomers in the wheat stems.
作者 孙淑芳 骆永丽 李春辉 金敏 胥倩 SUN Shu-fang;LUO Yong-li;LI Chun-hui;JIN Min;XU Qian(Agricultural College,Shandong Agricultural University/State Key Laboratory of Crop Biology,Tai'an 271018)
出处 《生物技术通报》 CAS CSCD 北大核心 2022年第10期66-72,共7页 Biotechnology Bulletin
基金 国家自然科学基金项目(31801330,32101834,32172117) 山东省自然科学基金(ZR2020QC106) 山东省泰山产业领军人才计划(LJNY2015001) 国家重点研发计划(2017YFD0301001,2016YFD0300403)。
关键词 UPLC-MS/MS 小麦 茎秆 木质素单体交联结构 回收率 UPLC-MS/MS wheat stem crosslinking structure of lignin monomer recovery
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